Tip#1 find a store you trust, with non idiots working there and develop a good relationship with them, trust them and your life goes smooth. Hell I can call my guy at night and he will meet me there if its an emergency.

Was 98 first year? All the ones I've seen with 4x4 hubs on 2wd have been 98-00ish. I wasn't aware 94-97 used the old rebuildable design.

In 98 they switched to larger dual piston calipers on blazers. On the 2wd blazers, they also switched to the unit bearing design. Before 98, the 2wd blazers used the serviceable design with an inner and outer tapered roller bearing, just like all 2wd S10s.

If you're working on the vehicle, you would have seen the old part since it should be in your hand to compare with the new part.

The tech in this discussion sounds like a parts changer, not a tech.

If you pull one part off and the replacement is not the same, a good tech would know better, hell even most mediocre techs would know better than to just bolt it on.

Too many people out there can pass a test to get certified, then they change parts and take shots in the dark. One of the main reasons auto repair has such a unsavory view by the general public and are considered shady or not trustworthy.

Unfortunately there are too many repair shops that have people working in them that have not been to training in 20 years, good thing nothing has changed in the automobiles in 20 years right.

In 98 they switched to larger dual piston calipers on blazers. On the 2wd blazers, they also switched to the unit bearing design. Before 98, the 2wd blazers used the serviceable design with an inner and outer tapered roller bearing, just like all 2wd S10s.

absolutely correct. all s10s 2wd from 94-2002 as far as i know use the tapered inner and outter bearing, and not the hub unit. as least all 6 of my 2wd s10s have used that setup.